US1277140A

US1277140A - Toggle-grinder.

Info

Publication number: US1277140A
Application number: US13512716A
Authority: US
Inventors: Dudley S Seymour
Original assignee: Union Special Machine Co
Current assignee: Union Special Machine Co
Priority date: 1916-12-05
Filing date: 1916-12-05
Publication date: 1918-08-27
Anticipated expiration: 1935-08-27

Description

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D. S. SEYMOUR.

TOGGLE GRINDER.

AERLICATION FILED DEC.5,19I6. 1,277,140. Patented Aug. 27, 1918:.

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D. S. SEYMOUR.

TOGGLE GRINDER.

APPLICATION FILED 0c.5. 19m,

1,277,140. Patented Aug. 27, 1918.

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D. S. SEYMOUR.

TOGGLE GRINDER.

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Patented Aug. 27, 1918..

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TOGGLE GRINDER.

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TOGGLE GRINDER.

APPLICATION FILED 050.5. l9lfi.

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D. S. SEYMOURx TOGGLE GRINDER. APPLICATION FILED DEC. 5. 1916. 1,277,140. Patented Aug. 27, 1918.

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ri'rnn STATES PATENT OFFICE.

DUDLEY s. SEYMOUR, or OAK PARK, ILLINoIs, 'AssIGNOR T0 UNION SPE I L MACHINE COMPANY, or CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TOGGLEGRIMDER.

Specification of Letters Patent.

Patented Aug. 27, 1918.

Applcation filed December 5, 1916. Serial No. 135,127.

Illinois, have invented certain new and useful Improvements in Toggle-Grinders, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in grinding machines, and more particularly to the holder for presenting the tool or object to be ground to the grinding wheel.

An object of the invention is to provide a grinding machine with a tool holder which may be properly manipulated for presenting either member of a toggle trimming mechanism to the grinding wheel.

A further object of the invention is to provide a tool holder for a grinding wheel wherein the holder may be swung in a plane parallel with the axis of the grinding wheel and also tilted or swung In a direction at right angles to said )lane.

wherein either of said members may be secured to the holder so that the pivot center of the toggle member will be in a line containing the pivotal axis of the holder.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings, which show by way of illustration one embodiment of the invention:

Figure 1 is a side elevation of a machine embodying the improvements;

Fig. 2 is a plan view of the same;

Fig. 3 is a view inside elevation and with certain of the parts in section to show the means for adjusting the carriage, the means for pivotally supporting the holder, and the means for holding the toggle trimming membi-r in the holder Fig. -lis a sectional view on the line l4 of Fig. 2;

- Fig. 5 is a sectional view on the line 5-5 of Fig. 3;

Fig. 6 is a view in plan showing a portion of the machine with one member of the toggle trimming mechanism clamped in the holder and held .in engagement with the grinding wheel;

Fig. 7 is a similar view, but showing the holder swung to a difierent position;

F ig..7" is a detail showing a portion of the holder and the lower toggle member clamped therein.

Fig. 8 is a view, partly in section, through the holder showing the lower toggle member supported and in engagement with the grinding wheel;

Fig. 9 is a similar view, but showing the upper toggle trimming memberclamped in the holder and the holder positioned for grinding one of the beveled sides of the toggle member;

I Fig. 10 is a side view showing the toggle members which the improved holder is particularly-adapted for supporting and grinding; and 4 4 Fig. 11 is a sectional view on the line 1111 of Fig. 10.

The invention is directed particuarly to a grinding machine for grinding the'members of a toggle trimming mechanism. A toggle trimming mechanism includes two trimming members which are each pivoted; and these toggle trimming members have rolling contact with each other so as to sever the material by abrasion. The'surface of the lower toggle member is in the arc of a circle struck about the center on which said member swings. The same is true of the upper toggle member. The severing surface of the lower toggle member is flat and comparatively wide. The severing surface of the upper toggle member is flat in cross section but relatively narrow and these two severing surfaces rolling on each other crush the material and sever the same by abrasion. The grinding machine is arovided with a holder which is especially adapted for the grinding of these toggle trimming members. Said holder is pivoted so as to swing in a plane parallel with the axis of rotation of the grinding wheel. The toggle member is clamped to the holder so that its pivot center is in line with the pivotal axis of the holder. This holder is mounted on a carriage which may be moved toward and from the grinding wheel. The toggle member when clamped in the holder is thus brought into engagement with the grinding wheel in which the holder is swung about its pivot so as to grind thesurface of the y a supporting base 1 which may be clamped to any suitable supporting member and said base has rising therefrom two supports which are formed with suitable bearings 2 and for a shaft 4. The shaft 4 is provided with a belt wheel 5 which may be driven from any suitable motor or other operating mecha nism. At one end of the shaft 4 there is a brush wheel 6. At the other end of the shaft there is a grindingwheel which is secured to the shaft by a clamping nut 8. A housing 9 incloses a portion of the grinding wheel.

Theholder is indicated at 10 in the drawings. Said'holder is carried by acarriage 11 which is mounted to slide toward and from the grinding wheel. The supporting base 1 has parallel projecting arms 12 which extend into a dovetailed groove 13 formed in the under face of the carriage 11. These arms serveas a suitable means for supporting the carriage whereby said carriage slides back and forth, asabove noted, toward and front the grinding wheel. The carriage is shifted by means of an adjusting screw 13. Said screw is mounted in a lug '14 so as to turn freely therein but is'held from endwise movement in said lug. "This lug is formed integral with the arms 12. Attached to the carriage 11 is a depending lug 15 which is threaded toreceive the screw 13. As the screw 13 is turned, the carriage will be moved back and forth depending upon the direction of rotation of the screw.

' Before describing in detail the holder for the trimming members I will describe a little more in detail the toggle trimming members which my device is particularly adapted to support and grind. The toggle trimming members are shown in detail in Figs. 10 and 11 of the drawings and consist of an upper member 16 and a lower member 17 These.

toggle trimming members are especially designed for use in a sewing machine for severing the fabric, which is being stitched. The upper member 16 is pivoted to swing about a center pivot at 18. The surface 20 of the lower trimming member is formed on the arc of acircle struck about the center 19.

Thesurface 21 of the upper trimming member is curved in the'arc of a circle struck about the center 18. The lower trimming member has a recessed portion 22while the upper trimmingimemberhas a depending lug 23 which engages said recessed portion and this causes the trimming members to surfaces crush the material and sever the same by abrasion. It sometimes occurs in practice that the metal on the upper toggle member is too hard and as a result the cutting edge will break, thus necessitating the 'grinding of this toggle member to reconstruct the surface. Then again, the metal may be too soft and the cutting edge will be flattened out, which necessitates the grinding of the toggle member. It sometimes also occurs that a groove is formed in the under toggle trimming member by this relatively narrow crushing surface on the upper toggle member and this necessitates the grinding out of this groove.

The holder for the toggle trimming members is pivotally supported on the carriage. Said holder includes a support 24. This support is clamped to a rod 25 by means of a set screw 26. The rod 25 is journaled in

bearings

27 and 28 formed on the carriage 11. Pivotally mounted on the support is the lower clamping member 29 of the holder. This clamping member has an opening 30 formed therethrough with a shoulder 31 adjacent its upper end. Extending down through the opening is a pivot post 32. This pivot post has a threadedshank 33 which engages a threaded opening 34 in the support 24. A look nut 35 holds the pivot pin in place. The upper'clamping member is indicated at 36.

A post 37 is mounted on the lower clamping member so as to freely swivel on said lower clamping member. This post rests on the shoulder 38 and the lower end thereof is riveted at 39 to hold the post in place. The post is formed with a slot 40 in its end and the clamping member 36 lies in this slot and is secured to the post 37 by apivot pin 41. The upper clamping member is swung on its pivot by a clamping screw 42 which is threaded into the outer end of the clamping member 36 and bears against a wear plate 43 on the lower clamping member.

The pivot post 32 is hollow, that is, it is formed with an opening 44 which extends entirely therethrough. A placing pin 45 is located in this opening and extends above the upper end thereof. Said pin has an ex tended head 46 which is adapted to bear against a shoulder in the opening 44 to limit the upward movement of the pin. Said pin is yieldingly forced in an upward direction by a spring 47 which bears against the lower end of the pin. This spring rests on a threaded cap 48 which is screwed into the lower end of the post.

In Figs. 7 a and 8 of the drawings I have shown the lower toggle trimming member 17 clamped by the holder and as being presented to the grinding wheel. The placing pin engages the opening 19 which is the pivot center for the lower toggle member. It is noted that this placing pin 45 has its center in the line of the pivot center around which the clamping members swing. The two jaws of the clamping members are sepa rated, then the lower toggle member is placed on the lower clamping jaw, after which the upper clamping member is firmly clamped against the lower clamping member by means of the screw 42. As will ap pear from Fig. 1 of the drawings the outer end of the rod 25 is proyided with a finger 49. Fixed to the carriage 11 is a stop 50 which is adapted to be engaged by this finger 49. There is also a second stop 51 which is adjustably mounted in a post 52 mounted on the carriage. ment of the finger 49 in the opposite direction. The rod 25 is clamped in a set position by a locking set screw 53 which is threaded through the post 27 and bears against the rod. When the finger 49 is against the stop 50 then the holder is positioned as shown in Fig. 8. When in this position the toggle trimming member-17 lies in a horizontal plane which passes substantially through the center of the grinding wheel and therefore the surface ground on the toggle member will be substantially at right angles to the plane of the toggle member. It will also be apparent that the surface ground will lie in an arc, the center of which is the center of the opening 19 and this is the pivot center of the lower toggle trimming member.

In Figs. 1, 2, 3, 6, I have shown the upper toggle member as clamped by the holder and positioned for grinding one of the beveled sides thereof.

It is noted that the aperture 19 issomewhat larger than the aperture 18. The placing pin 45 has its outer end cut down as at 45 so as to fit the aperturerlS. When the upper toggle trimming member 16 is placed on this reduced section of the placing pin, the pin may be depressed so that the toggle member will rise against the lower clamping member and thus clamp in the same manner the above described in connection with the lower toggle trimming member. If the holder is placed so as to swing in a horizontal plane, passing'through the center of the grinding wheel, then the surface 21 of the above toggle trimming member will be ground. In order to grind the beveled sides and the holder swung so that the finger 49 This limits the move- 7 and 9 of the drawings engages the stop 51. The carriage is moved upwardly so as to bring the trimming member into contact with the grinding wheel and it is then positioned so as to grind one of the beveled sides of said member. When the parts are positioned as shown in Fig. 9, then the side 21 will be ground. To grind the other beveled side 21*, the other beveled trimming member is merely turned over and clamped and presented to the grinding wheel. The pivot post for the holder has a cut-away section 54 which receives the extension 16 on the upper trimming member so as to permit the same to be clamped flat against the lower clamping member.

The brush wheel 6, referred to above, is impregnated with a suitable polishing powder and is used to break the square corners left by the grinding wheel so that the cutting edge of the upper toggle may be rounded ofi. The upper toggle should not have a sharp edge as the separating of the fabric sections through the action of the toggle trimming mechanism is brought about through the rubbing or abrading of the material in contradistinction to the actual cutting of it.

It is obvious that minor changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention, as set forth in the appended claims. Y

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is 1. A grinding machine including in combination a grindin wheel, a holder including clamping mem ers for clamping the article to be ground, a support on which said holder is pivotally mounted so as to swing in a. plane parallel with the aXis of the grinding wheel, means for pivotally sup porting said holder whereby it may be moved in a direction at right angles to the plane in which it is swung, a stop for limiting said last named swinging movement of the holder and means for securing the holder in position against said stop.

2. A grinding machine including in combination a grinding wheel, a holder including clamping 7 members for clamping the article tobe ground, a support on which said holder is pivotally mounted so as to swing in a plane parallel with the axis of the grindingwheel, means forpivotally supporting said holder whereby it may be moved in a direction at right angles to the planein which it, is swung, a stop for limiting said last named swinging movement of the holder and means for securing the holder in position against said stop, said stop being adjustable whereby the position of the article being ground may be shifted relative to the grinding wheel.

3. A grinding machine including in coming claiiipilig' 'n'ien'ibe'rs for clamping the article to be ground, a'support on which said holder is pivotally mounted so as to swing in plane parallel with theaxis of the grind toward" and "from tlie"grindiiig wheel to bring the article into engagement with'said 1'0 grinding wheel, said'holderbeing pivotally supported by said; carriage, whereby the same may be moved in 'a plane at right angles to the plane in which it'isswuiigf stops for limiting the tilting nioveineiit of the holdei'fand means ior'sec uring the iialed in said bearings, means for holding holder in an adjusted position. at. A grinding machine: including in combination a grinding wheel, a holder having l clamping members foi-"clan'i 'iing the article to be ground, a support on which said holder is pivoted so as to swing in a plane p'amllel' 3 with tlie'axis of thefgrinding"wheel, a carriage having spaced be i i iialed in the bearings oii which saidholder is clamped, at finger carried by said, rod and stops cooperating with said finger for limit ing the movement of the rod.

5. A grinding machineincludingin combii f clamping members for clamping the article tobe'grouiid, a support on wliich said holder p is pivoted so as to swingiira'planepaiallel with the axis of the grinding wheel, a carriage' having spaced' bearings, a rod jour naled in the bearings on \i 'hich said holder is clanipe'di a fiiigercarri'ed by said rod, stops cooperatingwith said "finger for limiting the movement of the rod, one of said stops being adjustable, and "means for clamping 40 the rod with the finger against its stops.

(3. A gi-iiidinginachin'e including in con1'-" (winding wheel, a holder having biiiation a i clamping members for 'clamping the article to be ground, a support on which-said holder ispivoted so as to swing ina plane parallel with the axis of the grinding wheel, a car I riage having spacedbearings, a'rod jouriialed in the bearings on which SitldllOlClQI' is clamped, a "finger carried by said rod,

stops cooperating with said fingerfor limit-' ing the movement of the rod, and means for moving 'said carriage toward andffrom the grinding wheel.

7. A grinding machine including in CO111' 'bl11iitl011 a grinding wheel, a holder having clamping members for clamping the article to be ground, a support on which said holder is pivoted so as to swing in a plane parallel withthe axisof the grinding wheel,a"carriage having Spacedbearings, a rod journaled in the bearings on which said holder is clamped, a finger carried by Copies of this patent may be'obtained for iigs, a rodfjourion afgrinding wheel, a liold erhaviiig said rod, stops cooperating with said ringer for limiti'ngth'e movement of the rod, one

v j of saidsio 'srami 'zitliieadeclscrew for moviiig'wheel, acarr age onwhi'ch sa'id'holder 1s mounted, means for moving said 'carriagef and'forth toward and from said wheel, a screw fori'n'oviiig the carriage andliolding thesame in an adjusted position, spaced bearings on the carriage, a rod freely joursaid rod in an adjusted position, a support clamped to said rod, and a'holder pivotally mounted on saidsupport, said; holder includiiig clamping jaws, said'pivotal support for'tlie holder being disposed so that the holder may be swung in a plane parallel with the 'axis of the grinding"wheel.

9. A grinding machineincluding in com- 'bination, a grinding wheel, a holder iiicluding clamping" members," means for pivotally supporting said -clamping members whereby they may be swung in a plane substantially parallel with the axis of the grinding wheel, a placing pin having its center in alin'ement with the 'pivotal axis for said holder and adapted to receive the pivot aperture of a toggle trimmer member clamped in said holder, whereby the edge of said trimmer may be ground in an archaving its center at the pivot center of said trimming member. 10. A grinding machine including in com- 'bination, a grinding wheel, a holder including clamping members, means for pivotally supporting said clamping members whereby "they may be swung in a plane substantially parallel with the axis of the grinding wheel,

and a placing pin having its center in alineinent with the pivotal axis for said holder and adapted to receive the pivot aperture of a toggle trimming member clamped in "said holder,- whereby theedge of said triniming member may be ground in an arc hav ing its center at the pivot center of said *t'riinming member, said placing pin being 'yieldingly mounted and having a reduced section'whereby toggle trimming members having different sized pivot'apertures may be separately placed thereon.

In testimony whereof, I afiix my sig1iature in the presence of two witnesses.

DUDLEY S. SEYMOUR.

WVitnesses S. GEORGE TATE,

F, C. BUTLER.